var dateFormat={};
//时间戳格式转换成时间格式年月日的格式
dateFormat.dateFormat = function(datetime){
	var year = datetime.getFullYear();
	 var month = datetime.getMonth()+1;//js从0开始取 
	 var date = datetime.getDate(); 
//	 var hour = datetime.getHours(); 
//	 var minutes = datetime.getMinutes(); 
//	 var second = datetime.getSeconds();
	 
	 if(month<10){
	  month = "0" + month;
	 }
	 if(date<10){
	  date = "0" + date;
	 }
//	 if(hour <10){
//	  hour = "0" + hour;
//	 }
//	 if(minutes <10){
//	  minutes = "0" + minutes;
//	 }
//	 if(second <10){
//	  second = "0" + second ;
//	 }
	 
	 var time = year+"-"+month+"-"+date;//+" "+hour+":"+minutes+":"+second; //2009-06-12 17:18:05
	 return time;
}